Fix vitest in Astro 5

.changeset/slimy-mice-dance.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fixes use of Vitest with Astro 5

packages/astro/package.json

@@ -224,7 +224,8 @@
     "rollup": "^4.21.2",
     "sass": "^1.78.0",
     "undici": "^6.19.8",
-    "unified": "^11.0.5"
+    "unified": "^11.0.5",
+    "vitest": "^2.1.1"
   },
   "engines": {
     "node": "^18.17.1 || ^20.3.0 || >=21.0.0",

packages/astro/src/config/index.ts

@@ -2,6 +2,7 @@ import type { UserConfig as ViteUserConfig } from 'vite';
 import { Logger } from '../core/logger/core.js';
 import { createRouteManifest } from '../core/routing/index.js';
 import type { AstroInlineConfig, AstroUserConfig } from '../types/public/config.js';
+import { createDevelopmentManifest } from '../vite-plugin-astro-server/plugin.js';
 
 export function defineConfig(config: AstroUserConfig) {
 	return config;
@@ -12,7 +13,7 @@ export function getViteConfig(
 	inlineAstroConfig: AstroInlineConfig = {},
 ) {
 	// Return an async Vite config getter which exposes a resolved `mode` and `command`
-	return async ({ mode, command }: { mode: string; command: 'serve' | 'build' }) => {
+	return async ({ mode, command }: { mode: 'dev'; command: 'serve' | 'build' }) => {
 		// Vite `command` is `serve | build`, but Astro uses `dev | build`
 		const cmd = command === 'serve' ? 'dev' : command;
 
@@ -42,6 +43,7 @@ export function getViteConfig(
 		let settings = await createSettings(config, userViteConfig.root);
 		settings = await runHookConfigSetup({ settings, command: cmd, logger });
 		const manifest = await createRouteManifest({ settings }, logger);
+		const devSSRManifest = createDevelopmentManifest(settings);
 		const viteConfig = await createVite(
 			{
 				mode,
@@ -50,7 +52,7 @@ export function getViteConfig(
 					astroContentListenPlugin({ settings, logger, fs }),
 				],
 			},
-			{ settings, logger, mode, sync: false, manifest },
+			{ settings, logger, mode, sync: false, manifest, ssrManifest: devSSRManifest },
 		);
 		await runHookConfigDone({ settings, logger });
 		return mergeConfig(viteConfig, userViteConfig);

packages/astro/src/core/create-vite.ts

@@ -41,17 +41,21 @@ import { joinPaths } from './path.js';
 import { vitePluginServerIslands } from './server-islands/vite-plugin-server-islands.js';
 import { isObject } from './util.js';
 
-interface CreateViteOptions {
+type CreateViteOptions = {
 	settings: AstroSettings;
 	logger: Logger;
-	mode: 'dev' | 'build' | string;
 	// will be undefined when using `getViteConfig`
 	command?: 'dev' | 'build';
 	fs?: typeof nodeFs;
 	sync: boolean;
 	manifest: ManifestData;
+} & ({
+	mode: 'dev';
+	ssrManifest: SSRManifest;
+} | {
+	mode: 'build';
 	ssrManifest?: SSRManifest;
-}
+});
 
 const ALWAYS_NOEXTERNAL = [
 	// This is only because Vite's native ESM doesn't resolve "exports" correctly.
@@ -134,8 +138,8 @@ export async function createVite(
 			astroScriptsPlugin({ settings }),
 			// The server plugin is for dev only and having it run during the build causes
 			// the build to run very slow as the filewatcher is triggered often.
-			mode !== 'build' &&
-				vitePluginAstroServer({ settings, logger, fs, manifest, ssrManifest: ssrManifest! }), // ssrManifest is only required in dev mode, where it gets created before a Vite instance is created, and get passed to this function
+			mode === 'dev' &&
+				vitePluginAstroServer({ settings, logger, fs, manifest, ssrManifest }), // ssrManifest is only required in dev mode, where it gets created before a Vite instance is created, and get passed to this function
 			envVitePlugin({ settings }),
 			astroEnv({ settings, mode, sync }),
 			markdownVitePlugin({ settings, logger }),

packages/astro/test/fixtures/vitest/astro.config.mjs

@@ -0,0 +1,5 @@
+import { defineConfig } from 'astro/config';
+
+export default defineConfig({
+	output: "static",
+});

packages/astro/test/fixtures/vitest/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "@test/vitest",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "scripts": {
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "astro": "workspace:*",
+    "vitest": "^2.1.1"
+  }
+}

packages/astro/test/fixtures/vitest/src/components/hello.spec.ts

@@ -0,0 +1,5 @@
+import { expect, test } from 'vitest';
+
+test('sup', () => {
+    expect(true).toBeTruthy();
+})

packages/astro/test/fixtures/vitest/src/pages/index.astro

@@ -0,0 +1,7 @@
+<html>
+  <head>
+    <title>testing</title>
+  </head>
+  <body>
+  </body>
+</html>

packages/astro/test/fixtures/vitest/vitest.config.js

@@ -0,0 +1,8 @@
+/// <reference types="vitest" />
+import { getViteConfig } from 'astro/config';
+
+export default getViteConfig({
+  test: {
+    // Vitest configuration options
+  },
+});

packages/astro/test/vitest.test.js

@@ -0,0 +1,25 @@
+
+import assert from 'node:assert/strict';
+import { describe, it } from 'node:test';
+import { fileURLToPath } from 'node:url';
+import { createVitest } from 'vitest/node'
+
+describe('vitest', () => {
+	it('basics', async () => {
+	  const config = new URL('./fixtures/vitest/vitest.config.js', import.meta.url);
+
+	  const vitest = await createVitest('test', {
+	  	config: fileURLToPath(config),
+	  	root: fileURLToPath(new URL('./fixtures/vitest/', import.meta.url)),
+	  	watch: false
+	  });
+
+	  try {
+	  	await vitest.start();
+	  } catch(_) {
+	  	assert.ok(false, 'test failed');
+	  } finally {
+			await vitest.close();
+		}
+	});
+});